>>723334123 (OP)
You can't. It's kind of like with novels. Read 18th century novels, they will follow some conventional storytelling, sure, but there will be some strangeness in them, very often they'll be just strange in their structure. Then there comes the classical novel of the 19th century and future novelists just endlessly copy the convention created back then. Postmodernists try to combat that but as a result they just copy some of the aspects of the pre-classical novel and turn those into convention, except nobody but aspiring artsy writers wants to read this shit anymore. There is no coming back to the authentic experimentation with the format that happened before it was established.
For less high brow example check what fantasy as a genre was like before that solidified. You have for instance Howard, who's settings are a mix of different anachronistic historical cultures living together on some supposedly ancient earth. Then you have something like The Night Land which is sort of post-apocalyptic(it's set in a far future when the sun goes dark). On another isle you have very whimsical Gods of Pegana that is more like some alien mythology than anything concrete. But at some point you get to the state where irish-accent dwarves fight green orcs, while long-lived elves sneer at lowly humans who still somehow become the dominant species in the world while all sci-fi elements, previously freely mixed with the genre seem to go away.
That is the natural course of any form of creation.
